import urllib
from bs4 import BeautifulSoup
import re

class HtmlParser(object):

    def parse(self, page_url, html_cont):
        if page_url is None or html_cont is None:
            return

        soup = BeautifulSoup(html_cont,'html.parser',from_encoding='utf-8')
        new_urls = self._get_new_urls(page_url, soup)
        new_data = self._get_new_data(page_url, soup)
        return new_urls,new_data

    def _get_new_urls(self, page_url, soup):
        new_urls = set()
        # links = soup.find_all('a',href = re.compile(r"/item/"))
        links = soup.find_all('a', href=re.compile(r"/subject/"))
        # links = soup.find_all('a', href=re.compile(r"/v"))
        # links = soup.find_all('a', href=re.compile(r"/a/"))
        for link in links:
            new_url = link['href']
            #拼接url
            new_full_url = urllib.parse.urljoin(page_url,new_url)
            new_urls.add(new_full_url)
        return new_urls

    def _get_new_data(self, page_url, soup):
        res_data = {}

        res_data['url'] = page_url
        #百度百科
        #<dd class="lemmaWgt-lemmaTitle-title">
        #<h1>Python</h1>
        # title_node = soup.find('dd',class_="lemmaWgt-lemmaTitle-title").find('h1')
        # res_data['title'] = title_node.get_text()
        # #<div class="lemma-summary" label-module="lemmaSummary">
        # summary_node = soup.find('div',class_="lemma-summary")
        # res_data['summary'] = summary_node.get_text()

        #豆瓣电影
        #<div id="content"><div id="dale_movie_subject_top_icon"></div>
        # <h1> <span property="v:itemreviewed">羞羞的铁拳</span>
        # <span class="year">(2017)</span> </h1>
        title_node = soup.find('div', id="content").find('h1')
        res_data['title'] = title_node.get_text()
        # <div class="indent" id="link-report"><span property="v:summary" class="">
        # </span></div>
        summary_node = soup.find('div', id="link-report")
        res_data['summary'] = summary_node.get_text()

        #搜狗百科
        #<div class="lemma_name">
	    #<h1 id="title">鸿门宴</h1>
        # title_node = soup.find('div',class_="lemma_name").find('h1')
        # res_data['title'] = title_node.get_text()
        # #<div class="abstract"> <p>
        # summary_node = soup.find('div',class_="abstract")
        # res_data['summary'] = summary_node.get_text()

        #凤凰网资讯
        #<div class="main main_wx">
        #<h1>十九大关于《中国共产党章程（修正案）》的决议</h1>
        # title_node = soup.find('div', class_="main main_wx").find('h1')
        # res_data['title'] = title_node.get_text()
        # #<div id="main_content" class="js_selection_area" data-fid="fad431cbe7">
        # #<p>
        # summary_node = soup.find('div', id="main_content")
        # res_data['summary'] = summary_node.get_text()

        return res_data